Around 60 firefighters tackled a house fire in Forest Hill.
The London Fire Brigade said the whole of the first floor and the roof of the house in Melford Road were badly damaged.
A man and woman left the house, unhurt before the brigade arrived and another woman from a neighbouring property was assessed at the scene by London Ambulance Service crews.
Huge plumes of smoke were pictured rising from the home in east Dulwich on Monday morning.
Video footage showed smoke billowing from the top of the house.
Another video showed firefighters battling the fire with an aerial device to access the roof.
Eight fire engines from West Norwood and surrounding fire stations were at the scene and had the fire under control by 9.15am.
The cause of the fire is under investigation.
